A new estimation of manganese distribution for local dwarf spheroidal galaxies
Liu MenQuan1; Wang ZhongXiang2
AbstractThe distribution of abundance for iron-peak elements in dwarf spheroidal galaxies (dSphs) is important for galaxy evolution and supernova (SN) nucleosynthesis. Nowadays, manganese (Mn) is one of the most observed iron-peak elements in local dSphs. Studies of its distributions allow us to derive and understand the evolution history of these dSphs. We improve a phenomenological model by a two-curve model including a new initial condition, that includes detailed calculations of SN explosion rates and yields. We compare the results with the observed Mn distribution data for three dSphs: Fornax, Sculpture and Sextans. We find that the model can describe the observed Fe and Mn distributions well simultaneously for the three dSphs. The results also indicate that the initial conditions should be determined by the low metalli city samples in the beginning time of the galaxies and the previous assumption of metellicity-dependant Mn yield of SNIa is not needed when a wide mass range of core-collapse SNe is included. Our method is applicable to the chemical evolution of other iron-peak elements in dSphs and can be modified to provide more detailed processes for the evolution of dSphs.
KeywordCHANDRASEKHAR-MASS MODELS CHEMICAL EVOLUTION IA SUPERNOVAE MILKY-WAY NUCLEOSYNTHESIS EXPLOSION ABUNDANCES galaxies: dwarf galaxies: individual (Fornax, Sculptor, Sextans) galaxies: evolution supernovae: general
Funding Project[National Natural Science Foundation of China] ; [China Scholarship]
Document Type期刊论文
Recommended Citation
GB/T 7714
Liu MenQuan,Wang ZhongXiang. A new estimation of manganese distribution for local dwarf spheroidal galaxies[J]. RESEARCH IN ASTRONOMY AND ASTROPHYSICS,2016,16(9).
APA Liu MenQuan,&Wang ZhongXiang.(2016).A new estimation of manganese distribution for local dwarf spheroidal galaxies.RESEARCH IN ASTRONOMY AND ASTROPHYSICS,16(9).
MLA Liu MenQuan,et al."A new estimation of manganese distribution for local dwarf spheroidal galaxies".RESEARCH IN ASTRONOMY AND ASTROPHYSICS 16.9(2016).
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